14390921 has 2 divisors, whose sum is σ = 14390922. Its totient is φ = 14390920.

The previous prime is 14390917. The next prime is 14390927. The reversal of 14390921 is 12909341.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10310521 + 4080400 = 3211^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 14390921 - 2² = 14390917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (14390927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7195460 + 7195461.

It is an arithmetic number, because the mean of its divisors is an integer number (7195461).

Almost surely, 2^14390921 is an apocalyptic number.

It is an amenable number.

14390921 is a deficient number, since it is larger than the sum of its proper divisors (1).

14390921 is an equidigital number, since it uses as much as digits as its factorization.

14390921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 14390921 is about 3793.5367402992. The cubic root of 14390921 is about 243.2369391552.

The spelling of 14390921 in words is "fourteen million, three hundred ninety thousand, nine hundred twenty-one".